acoustic
/əˈkuːstɪk; ə`kustɪk/ adj 1 (a) of sound or the sense of hearing 声音的; 听觉的. (b) of acoustics 1 传音效果的; 声学的. 2 [usu attrib 通常作定语] (of a musical instrument) not electric （指乐器）原声的（不是电的）: an acoustic guitar 原声吉他. =>illus at App 1 见附录1之插图, page xi.n [sing] = acoustics 1: The hall has a fine acoustic. 这个大厅的传音效果很好.
